Submission #1303619

#	Time	Username	Problem	Language	Result	Execution time	Memory
1303619		khba	Stove (JOI18_stove)	C++20	100 / 100	14 ms	1484 KiB

stove

// author: khba
// road to IZhO gold

#include "bits/stdc++.h"
using namespace std;

#ifdef khba
#include "debug.h"
#else
#define print(...) 42
#endif


int32_t main()
{
#ifdef khba
    freopen("in.txt", "r", stdin);
    freopen("out.txt", "w", stdout);
#endif
    ios ::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n, k; cin >> n >> k;
    vector <int> a(n);
    for (int &i : a) cin >> i;
    k = n - k;
    vector <int> d;
    for (int i = 1; i < n; ++i) d.emplace_back(a[i] - a[i-1]);
    sort(begin(d), end(d));
    int64_t ans = n;
    for (int i = 0; i < k; ++i) ans += d[i] - 1;
    cout << ans;
    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50